Cleanout door for chimney flues



Junezo, 1950 GLIEDEN 2,512,229

CLEANOUT DOOR FOR CHIMNEY FLUES Filed June 12, 1945 Y y g g L g l five/Mar fif'er M. Q7/2226 J/for); g/s

Patented June 20, 1950 OFF C Peter M. Glieden, Marshall, Mini 1., assignor to George Graffunder, Marshall, Minn. I ,Application'June 12,1945;Serial-No.599,0891

The present invention relates to. clean-out doors for chimney fiues andparticularlyto that type which is wholly-removable as contradistin- 2 Claims. (01; 72 597)] guished from hinged and otherwise attached doors. I

A primary object of the invention is to provide a device of the foregoing type of simpler and less expensive construction than the doors now in general use.

Another object is to provide a clean-out door which will not rust and stickand will not warp out of shape.

A further object is to provide aclean-out door and frame therefor which may be readily installed in place at the base of the chimney-flue when the chimney bricks are laid or subsequently.

Still another object is to provide a clean-out door for chimney-flues which does not require the multi-part operating mechanisms generally considered necessary in prior devices.

With the foregoing and other objects and advantages in view my invention consists of the novel construction and arrangement of parts herein disclosed and claimed.

In the accompanying drawings illustrating the invention,

Figure 1 is a front elevation of the door and frame set in place in the base of the chimney.

Figure 2 is a vertical section of door and frame 1 on line 2--2 of Figure 1.

Figure 3 is a transverse sectional view of door and frame on line 33 of Figure 2.

Like numerals are used in the drawings and description to designate like parts of construction.

At the base of the chimney C and in the flueopening F is set the flue closure consisting of a rectangular frame of suitable dimensions and a removable door conforming to the frame. I designates the frame and 2 the door. In the construction of both cement is preferably employed but either or both may be constructed of any other suitable material such as cast-iron. The upper and lower interior sides 3 and 4 of the opening 5 in the frame are constructed at right angles to the vertical sides of the opening and beveled or downwardly inclined, as at 6 and 1, to a point approximately midway the thickness of the frame. transversely of the opening in the frame and are formed above and below the same to create upper and lower horizontal shoulders, as at 8 and 9. The vertical sides I0 and II of the frame-opening are ofi-set, as at I 2 and I3 and the shoulders These beveled surfaces are disposed i thus for-med are b'eveled downwardly from front to rear at the same angle .asthe upper and lower beveled surfaces..6;.and l and approximately to the same vertical .planewith the, horizontal shouldersg8 and 9. The door 2 is constructed in rectangular shape and its contour conforms to theopening f the frame]. Itlishiade with suflicient thickness .to allow the back to seat against the-transverse .shoulders ll and-9 of the opening, in the frame. and theYfront to assume a position flush withthe face of the frame. The ,topand bottom edges are beveled transversely to fit. the upper. and lower beveled surfaces 6 and I of the frame and produceasnug. closure when the door is-in place. The vertical sides. or edges l4 and I5 of the door are provided with off-sets beveled and positioned to fit against the beveled shoulders 12 and 13 formed on the vertical sides of the door-frame. A hand-grasp I6 is provided on the front of the door.

In operation a complete closure of the chimney-flue is effected and the door interlocked with the frame by seating its lower beveled edge in the groove formed by the beveled surface 1 and contiguous transverse shoulder 9 of the lower part of the frame I and then forcing the beveled shoulders of the vertical sides of the door into engagement with the contiguous beveled shoulders at [2 and I3 on the inner vertical sides of the frame. To remove the door it is necessary merely to lift it by the hand-grasp from its seat in the said groove and at the same time give it a forward and upward pull, thereby disengaging the interlocked shoulders.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. A closure for the clean-out opening of a chimney flue, said closure comprising a frame set into the clean-out opening formed with a vertically elongated substantially rectangular door opening communicating with the interior of the chimney flue, said. door opening comprising a rear section and a front section, said rear section having substantially plane parallel sidewalls and top and bottom walls and being smaller in area than said front section, said front section having parallel top and bottom walls similarly rearwardly declined and of substantially the same width. said front section top and bottom walls being vertically positioned to define transverse shoulders above and below, respectively, the top and bottom walls of said rear door opening section, the sidewalls of said front section comprising upper parallel portions and lower parallel portions, the upper parallel portions being spaced laterally outwardly from the lower parallel portions so as to define abbreviated shoulders on the upper ends of said lower parallel portions, said shoulders being rearwardly declined at substantially the same angle as said top and bottom walls of said front door opening section, and a door comprising a plate of substantially uniform thickness and of similar dimensions to said front door opening section arranged to seat conform'ably in said front opening section with its front face substantially flush with the front face of said frame, and its back face abutting said transverse shoulders.

2. A closure for the clean-out opening of a chimney flue, said closure comprising a frame set into the clean-out opening formed with a vertically elongated substantially rectangular door opening communicating with the interior of the chimney flue, said door Opening comprising a rear section and a front section, said rear section having substantially plane parallel sidewalls and top and bottom walls and being smaller in area than said front section, said front section having parallel top and bottom walls similarly rearwardly declined and of substantially the same width, said front section top and bottom walls being vertically positioned to define transverse shoulders above and below, respectively, the top and bottom walls of said rear door opening section, the sidewalls of said front section comprising upper parallel portions and lower parallel portions, the upper parallel portions being spaced laterally outwardly from the lower parallel portions so as to define abbreviated shoulders on the upper ends of said lower length, width, and declination as said top and bottom walls of said front door opening section, sidewalls comprising upper and lower portions conforming to said upper and lower sidewall portionsof said front section opening, and declining shoulders at the lower ends of said upper -sidewall"portion's conforming to said shoulders on the upper ends of said lower sidewall portions of said front door opening section, and abbreviated rearwardly declining portions at the sides of said door conformably engaging said abbreviated shoulders.

PETER M. GLIEDEN.

REFERENCES CITED The following references are of record in th file of this patent:

FOREIGN PATENTS Number Country Date 57,200 Austria June 10, 1913 454,241 Germany Jan. 3, 1928 21,450 Netherlands 1930 503,618 Germany July 29, 1930 

